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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include "pk11pub.h"
#include "secerr.h"
#include "nss.h"
static SECStatus
hex_to_byteval(const char *c2, unsigned char *byteval)
{
int i;
unsigned char offset;
*byteval = 0;
for (i = 0; i < 2; i++) {
if (c2[i] >= '0' && c2[i] <= '9') {
offset = c2[i] - '0';
*byteval |= offset << 4 * (1 - i);
} else if (c2[i] >= 'a' && c2[i] <= 'f') {
offset = c2[i] - 'a';
*byteval |= (offset + 10) << 4 * (1 - i);
} else if (c2[i] >= 'A' && c2[i] <= 'F') {
offset = c2[i] - 'A';
*byteval |= (offset + 10) << 4 * (1 - i);
} else {
return SECFailure;
}
}
return SECSuccess;
}
static SECStatus
aes_encrypt_buf(
const unsigned char *key, unsigned int keysize,
const unsigned char *iv, unsigned int ivsize,
unsigned char *output, unsigned int *outputlen, unsigned int maxoutputlen,
const unsigned char *input, unsigned int inputlen,
const unsigned char *aad, unsigned int aadlen, unsigned int tagsize)
{
SECStatus rv = SECFailure;
SECItem key_item;
PK11SlotInfo *slot = NULL;
PK11SymKey *symKey = NULL;
CK_NSS_GCM_PARAMS gcm_params;
SECItem param;
/* Import key into NSS. */
key_item.type = siBuffer;
key_item.data = (unsigned char *)key; /* const cast */
key_item.len = keysize;
slot = PK11_GetInternalSlot();
symKey = PK11_ImportSymKey(slot, CKM_AES_GCM, PK11_OriginUnwrap,
CKA_ENCRYPT, &key_item, NULL);
PK11_FreeSlot(slot);
slot = NULL;
if (!symKey) {
fprintf(stderr, "PK11_ImportSymKey failed\n");
goto loser;
}
gcm_params.pIv = (unsigned char *)iv; /* const cast */
gcm_params.ulIvLen = ivsize;
gcm_params.pAAD = (unsigned char *)aad; /* const cast */
gcm_params.ulAADLen = aadlen;
gcm_params.ulTagBits = tagsize * 8;
param.type = siBuffer;
param.data = (unsigned char *)&gcm_params;
param.len = sizeof(gcm_params);
if (PK11_Encrypt(symKey, CKM_AES_GCM, ¶m,
output, outputlen, maxoutputlen,
input, inputlen) != SECSuccess) {
fprintf(stderr, "PK11_Encrypt failed\n");
goto loser;
}
rv = SECSuccess;
loser:
if (symKey != NULL) {
PK11_FreeSymKey(symKey);
}
return rv;
}
static SECStatus
aes_decrypt_buf(
const unsigned char *key, unsigned int keysize,
const unsigned char *iv, unsigned int ivsize,
unsigned char *output, unsigned int *outputlen, unsigned int maxoutputlen,
const unsigned char *input, unsigned int inputlen,
const unsigned char *aad, unsigned int aadlen,
const unsigned char *tag, unsigned int tagsize)
{
SECStatus rv = SECFailure;
unsigned char concatenated[11 * 16]; /* 1 to 11 blocks */
SECItem key_item;
PK11SlotInfo *slot = NULL;
PK11SymKey *symKey = NULL;
CK_NSS_GCM_PARAMS gcm_params;
SECItem param;
if (inputlen + tagsize > sizeof(concatenated)) {
fprintf(stderr, "aes_decrypt_buf: local buffer too small\n");
goto loser;
}
memcpy(concatenated, input, inputlen);
memcpy(concatenated + inputlen, tag, tagsize);
/* Import key into NSS. */
key_item.type = siBuffer;
key_item.data = (unsigned char *)key; /* const cast */
key_item.len = keysize;
slot = PK11_GetInternalSlot();
symKey = PK11_ImportSymKey(slot, CKM_AES_GCM, PK11_OriginUnwrap,
CKA_DECRYPT, &key_item, NULL);
PK11_FreeSlot(slot);
slot = NULL;
if (!symKey) {
fprintf(stderr, "PK11_ImportSymKey failed\n");
goto loser;
}
gcm_params.pIv = (unsigned char *)iv;
gcm_params.ulIvLen = ivsize;
gcm_params.pAAD = (unsigned char *)aad;
gcm_params.ulAADLen = aadlen;
gcm_params.ulTagBits = tagsize * 8;
param.type = siBuffer;
param.data = (unsigned char *)&gcm_params;
param.len = sizeof(gcm_params);
if (PK11_Decrypt(symKey, CKM_AES_GCM, ¶m,
output, outputlen, maxoutputlen,
concatenated, inputlen + tagsize) != SECSuccess) {
goto loser;
}
rv = SECSuccess;
loser:
if (symKey != NULL) {
PK11_FreeSymKey(symKey);
}
return rv;
}
/*
* Perform the AES Known Answer Test (KAT) in Galois Counter Mode (GCM).
*
* respfn is the pathname of the RESPONSE file.
*/
static void
aes_gcm_kat(const char *respfn)
{
char buf[512]; /* holds one line from the input REQUEST file.
* needs to be large enough to hold the longest
* line "CIPHERTEXT = <320 hex digits>\n".
*/
FILE *aesresp; /* input stream from the RESPONSE file */
int i, j;
unsigned int test_group = 0;
unsigned int num_tests = 0;
PRBool is_encrypt;
unsigned char key[32]; /* 128, 192, or 256 bits */
unsigned int keysize = 16;
unsigned char iv[10 * 16]; /* 1 to 10 blocks */
unsigned int ivsize = 12;
unsigned char plaintext[10 * 16]; /* 1 to 10 blocks */
unsigned int plaintextlen = 0;
unsigned char aad[10 * 16]; /* 1 to 10 blocks */
unsigned int aadlen = 0;
unsigned char ciphertext[10 * 16]; /* 1 to 10 blocks */
unsigned int ciphertextlen = 0;
unsigned char tag[16];
unsigned int tagsize = 16;
unsigned char output[10 * 16]; /* 1 to 10 blocks */
unsigned int outputlen = 0;
unsigned int expected_keylen = 0;
unsigned int expected_ivlen = 0;
unsigned int expected_ptlen = 0;
unsigned int expected_aadlen = 0;
unsigned int expected_taglen = 0;
SECStatus rv;
if (strstr(respfn, "Encrypt") != NULL) {
is_encrypt = PR_TRUE;
} else if (strstr(respfn, "Decrypt") != NULL) {
is_encrypt = PR_FALSE;
} else {
fprintf(stderr, "Input file name must contain Encrypt or Decrypt\n");
exit(1);
}
aesresp = fopen(respfn, "r");
if (aesresp == NULL) {
fprintf(stderr, "Cannot open input file %s\n", respfn);
exit(1);
}
while (fgets(buf, sizeof buf, aesresp) != NULL) {
/* a comment or blank line */
if (buf[0] == '#' || buf[0] == '\n') {
continue;
}
/* [Keylen = ...], [IVlen = ...], etc. */
if (buf[0] == '[') {
if (strncmp(&buf[1], "Keylen = ", 9) == 0) {
expected_keylen = atoi(&buf[10]);
} else if (strncmp(&buf[1], "IVlen = ", 8) == 0) {
expected_ivlen = atoi(&buf[9]);
} else if (strncmp(&buf[1], "PTlen = ", 8) == 0) {
expected_ptlen = atoi(&buf[9]);
} else if (strncmp(&buf[1], "AADlen = ", 9) == 0) {
expected_aadlen = atoi(&buf[10]);
} else if (strncmp(&buf[1], "Taglen = ", 9) == 0) {
expected_taglen = atoi(&buf[10]);
test_group++;
if (test_group > 1) {
/* Report num_tests for the previous test group. */
printf("%u tests\n", num_tests);
}
num_tests = 0;
printf("Keylen = %u, IVlen = %u, PTlen = %u, AADlen = %u, "
"Taglen = %u: ",
expected_keylen, expected_ivlen,
expected_ptlen, expected_aadlen, expected_taglen);
/* Convert lengths in bits to lengths in bytes. */
PORT_Assert(expected_keylen % 8 == 0);
expected_keylen /= 8;
PORT_Assert(expected_ivlen % 8 == 0);
expected_ivlen /= 8;
PORT_Assert(expected_ptlen % 8 == 0);
expected_ptlen /= 8;
PORT_Assert(expected_aadlen % 8 == 0);
expected_aadlen /= 8;
PORT_Assert(expected_taglen % 8 == 0);
expected_taglen /= 8;
} else {
fprintf(stderr, "Unexpected input line: %s\n", buf);
exit(1);
}
continue;
}
/* "Count = x" begins a new data set */
if (strncmp(buf, "Count", 5) == 0) {
/* zeroize the variables for the test with this data set */
memset(key, 0, sizeof key);
keysize = 0;
memset(iv, 0, sizeof iv);
ivsize = 0;
memset(plaintext, 0, sizeof plaintext);
plaintextlen = 0;
memset(aad, 0, sizeof aad);
aadlen = 0;
memset(ciphertext, 0, sizeof ciphertext);
ciphertextlen = 0;
memset(output, 0, sizeof output);
outputlen = 0;
num_tests++;
continue;
}
/* Key = ... */
if (strncmp(buf, "Key", 3) == 0) {
i = 3;
while (isspace((unsigned char)buf[i]) || buf[i] == '=') {
i++;
}
for (j = 0; isxdigit((unsigned char)buf[i]); i += 2, j++) {
hex_to_byteval(&buf[i], &key[j]);
}
keysize = j;
if (keysize != expected_keylen) {
fprintf(stderr, "Unexpected key length: %u vs. %u\n",
keysize, expected_keylen);
exit(1);
}
continue;
}
/* IV = ... */
if (strncmp(buf, "IV", 2) == 0) {
i = 2;
while (isspace((unsigned char)buf[i]) || buf[i] == '=') {
i++;
}
for (j = 0; isxdigit((unsigned char)buf[i]); i += 2, j++) {
hex_to_byteval(&buf[i], &iv[j]);
}
ivsize = j;
if (ivsize != expected_ivlen) {
fprintf(stderr, "Unexpected IV length: %u vs. %u\n",
ivsize, expected_ivlen);
exit(1);
}
continue;
}
/* PT = ... */
if (strncmp(buf, "PT", 2) == 0) {
i = 2;
while (isspace((unsigned char)buf[i]) || buf[i] == '=') {
i++;
}
for (j = 0; isxdigit((unsigned char)buf[i]); i += 2, j++) {
hex_to_byteval(&buf[i], &plaintext[j]);
}
plaintextlen = j;
if (plaintextlen != expected_ptlen) {
fprintf(stderr, "Unexpected PT length: %u vs. %u\n",
plaintextlen, expected_ptlen);
exit(1);
}
if (!is_encrypt) {
rv = aes_decrypt_buf(key, keysize, iv, ivsize,
output, &outputlen, sizeof output,
ciphertext, ciphertextlen, aad, aadlen, tag, tagsize);
if (rv != SECSuccess) {
fprintf(stderr, "aes_decrypt_buf failed\n");
goto loser;
}
if (outputlen != plaintextlen) {
fprintf(stderr, "aes_decrypt_buf: wrong output size\n");
goto loser;
}
if (memcmp(output, plaintext, plaintextlen) != 0) {
fprintf(stderr, "aes_decrypt_buf: wrong plaintext\n");
goto loser;
}
}
continue;
}
/* FAIL */
if (strncmp(buf, "FAIL", 4) == 0) {
plaintextlen = 0;
PORT_Assert(!is_encrypt);
rv = aes_decrypt_buf(key, keysize, iv, ivsize,
output, &outputlen, sizeof output,
ciphertext, ciphertextlen, aad, aadlen, tag, tagsize);
if (rv != SECFailure) {
fprintf(stderr, "aes_decrypt_buf succeeded unexpectedly\n");
goto loser;
}
if (PORT_GetError() != SEC_ERROR_BAD_DATA) {
fprintf(stderr, "aes_decrypt_buf failed with incorrect "
"error code\n");
goto loser;
}
continue;
}
/* AAD = ... */
if (strncmp(buf, "AAD", 3) == 0) {
i = 3;
while (isspace((unsigned char)buf[i]) || buf[i] == '=') {
i++;
}
for (j = 0; isxdigit((unsigned char)buf[i]); i += 2, j++) {
hex_to_byteval(&buf[i], &aad[j]);
}
aadlen = j;
if (aadlen != expected_aadlen) {
fprintf(stderr, "Unexpected AAD length: %u vs. %u\n",
aadlen, expected_aadlen);
exit(1);
}
continue;
}
/* CT = ... */
if (strncmp(buf, "CT", 2) == 0) {
i = 2;
while (isspace((unsigned char)buf[i]) || buf[i] == '=') {
i++;
}
for (j = 0; isxdigit((unsigned char)buf[i]); i += 2, j++) {
hex_to_byteval(&buf[i], &ciphertext[j]);
}
ciphertextlen = j;
if (ciphertextlen != expected_ptlen) {
fprintf(stderr, "Unexpected CT length: %u vs. %u\n",
ciphertextlen, expected_ptlen);
exit(1);
}
continue;
}
/* Tag = ... */
if (strncmp(buf, "Tag", 3) == 0) {
i = 3;
while (isspace((unsigned char)buf[i]) || buf[i] == '=') {
i++;
}
for (j = 0; isxdigit((unsigned char)buf[i]); i += 2, j++) {
hex_to_byteval(&buf[i], &tag[j]);
}
tagsize = j;
if (tagsize != expected_taglen) {
fprintf(stderr, "Unexpected tag length: %u vs. %u\n",
tagsize, expected_taglen);
exit(1);
}
if (is_encrypt) {
rv = aes_encrypt_buf(key, keysize, iv, ivsize,
output, &outputlen, sizeof output,
plaintext, plaintextlen, aad, aadlen, tagsize);
if (rv != SECSuccess) {
fprintf(stderr, "aes_encrypt_buf failed\n");
goto loser;
}
if (outputlen != plaintextlen + tagsize) {
fprintf(stderr, "aes_encrypt_buf: wrong output size\n");
goto loser;
}
if (memcmp(output, ciphertext, plaintextlen) != 0) {
fprintf(stderr, "aes_encrypt_buf: wrong ciphertext\n");
goto loser;
}
if (memcmp(output + plaintextlen, tag, tagsize) != 0) {
fprintf(stderr, "aes_encrypt_buf: wrong tag\n");
goto loser;
}
}
continue;
}
}
/* Report num_tests for the last test group. */
printf("%u tests\n", num_tests);
printf("%u test groups\n", test_group);
printf("PASS\n");
loser:
fclose(aesresp);
}
int
main(int argc, char **argv)
{
if (argc < 2) {
return 1;
}
if (NSS_NoDB_Init(NULL) != SECSuccess) {
return 1;
}
/*************/
/* AES */
/*************/
if (strcmp(argv[1], "aes") == 0) {
/* argv[2]=kat argv[3]=gcm argv[4]=<test name>.rsp */
if (strcmp(argv[2], "kat") == 0) {
/* Known Answer Test (KAT) */
aes_gcm_kat(argv[4]);
}
}
if (NSS_Shutdown() != SECSuccess) {
return 1;
}
return 0;
}